#include <iostream>
#include <cstring>
using namespace std;
class Point
{
  int x, y; //点的x和y坐标
public:
  Point(int = 0, int = 0); // 构造函数
  void SetPoint(int, int); // 设置坐标
  int GetX() { return x; } // 取x坐标
  int GetY() { return y; } // 取y坐标
  void Print();            //输出点的坐标 };
  Point(int a, int b) { SetPoint(a, b); }
  void SetPoint(int a, int b)
  {
    x = a;
    y = b;
  }
  void Print()
  {
    cout << "[" << x << "," << y << "]";
  }
};

class Circle : public Point
{
  private:
    double radius;
    public:
    Circle
}